FBI Director Christopher Wray said Tuesday that he wouldn’t use the word “spying” to describe the bureau’s investigative work, breaking from Attorney General William Barr’s use of the term in reference to the probe of Donald Trump’s 2016 campaign.

“Well, it’s not the term I would use. Lots of people have different colloquial phrases,” Wray said during testimony before the Senate Appropriations Committee. “I believe that the FBI is engaged in investigative activity, and part of investigative activity includes surveillance.”

Trump has claimed the FBI “spied” on his campaign and that subsequent investigations into Russian interference in the 2016 election, including by special counsel Robert Mueller, were part of an “attempted coup” against him.